It can also mean an "idiot" according according to Longman.
jerk 2 noun [ countable ]
1 a sudden quick movement : He gave a sudden jerk of his head .
with a jerk She started the car with a jerk and hit the bumper of the car in front.
2 informal someone, especially a man, who is stupid or who does things that annoy or hurt other people SYN idiot : I swore at him for being such a jerk.
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